Bearcreek, MT 59008 Frost Dates
Bearcreek, MT: when does the frost end?
The last spring frost here typically falls around 06/03, about 279 days from today. Fall's first freeze usually shows up around 09/19, roughly 106 days after the last spring frost.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Bearcreek, not a forecast for this year.
Stretching the season past the first frost
With roughly 3 weeks until Bearcreek's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
06/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/18 and only about 1 year in 10 sees frost after that.
Bearcreek against the rest of the dataset
At roughly 106 frost-free days, Bearcreek places 39,591 of 40,283 ZIP codes in this dataset. Within MT, it ranks 290 of 392.
Learn more
Before leaning on 59008's figures: the frost range explains how to read the range around Bearcreek's dates instead of trusting one, while local microclimates explains what one yard in Bearcreek can differ from the 59008 normal.